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34 Cards in this Set
- Front
- Back
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iliacus |
Large fan shaped more lateral muscle O- iliac fossa and crest of lateral sacrum I-femur on and immediately below lesser trochanter of femur via iliopsoas tendon prime mover for flexing the thigh or for flexing the trunk femoral nerve |
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Psoas major |
longer thicker more medial muscle of iliopsoas (butchers refer to this muscle as the tenderloin) O-transverse processes, bodies and disks of lumbar vertebrae and T12 I-lesser trochanter of femur via iliopsoas tendon flexing thigh or truck; important postural muscle Ventral rami L1-L3 |
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Sartorius |
Strap like muscle running obliquely across anterior surface of thigh O-anterior superior illiac spine I- winds around medial aspect of knee and inserts in medial aspect of proximal tibia flexes abducts and laterally rotates thigh femoral nerve |
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Adductor magnus |
triangular muscle with part adductor and part hamstring action O-ischial and pubic rami and ischial tuberosity I-linea aspera and adductor tubercle of femur anterior adducts and medial rotates thigh; posterior is synergist of hamstrings in thigh extension |
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Adductor longus |
overlies middle aspect of adductor magnus; most anterior adductor muscles O-pubis I-linea aspera adducts, flexes and medial rotates thigh obterator nerve |
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Adductor brevis |
O-body of inferior ramus of pubis I-linea aspera above adductor longs adducts and medial rotates thigh obturator nerve |
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Pectinus |
short flat muscle O- pectineal line of pubis I-inferior from lesser trochanter to the line aspera of posterior aspect of femur adducts, flexes and medial rotates thigh femoral and sometimes obturator |
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gracilis |
long thin superficial medial muscle of thigh O-inferior ramus and body of pubis and adjacent ischial ramus I-medial surface of tibia just inferior to medial condyle adducts thigh, flexes and medial rotates thigh, flexes knee obterator |
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rectus femoris |
superficial muscle of anterior thigh- only muscle of group to cross hip joint O-anterior inferior iliac spine and superor margin of acetabulum I-patella and tibial tuberosity via patellar ligament Extends knee and flexes thigh at hip femoral nerve |
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vastus lateralis |
common IM injection site, particularly infants (who have poorly developed buttock and arm muscles) O- greater trochanter I-patella and tibial tuberosity extends and stabilizes knee femoral nerve |
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vastus medialis |
O-linea aspera, intertrochanteric line I-patella and tibial tuberosity extends knee, stabilizes patella |
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Vastus intermedius |
O-anterial and lateral surfaces of proximal femur shaft I-patella and tibial tuberosity extends knee femoral nerve |
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Tensor Fasciae Latae |
O- ASIS I- Iliotibialtract flexes and abducts thigh; rotates the thigh medially superior gluteal nerve |
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gluteus maximus |
largest and most superficial of gluteus muscles; overlies large sciatic nerve O-dorsal ilium, sacrum, and coccyx I-gluteal tuberosity of femur; iliotibial tract inferior gluteal nerve |
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gluteus medius |
thick muscle largely covered by gluteus maximus - ventral portion is safer for IM injections since it is less likely to be over sciactic nerve O- b/n anterior and inferior gluteal lines on external surface of ilium I-anterior border of greater trochanter of femur adducts and medial rotates thigh; steadies pelvis |
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gluteus minimus |
smallest and deepest muscle O- b/n anterior and inferior gluteal lines on external surface of ilium I-anterior border of greater trochanter of femur |
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piriformis |
issues from pelvis via greater sciatic notch O-anterolateral surface of sacrum I-superior boarder of greater trochanter in femur rotates and extends thigh laterally; can assist in abduction of thigh; stabilizes hip joint S1 and S2-L5 |
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obturator externus |
O- outer surface of obturator membrane, pubis and ischium, margins of obturator foramen I- by tendon into trochanteric fossa of posterior femur rotates and extends thigh laterally obturator nerve |
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Obturator internus |
O-inner surface of obturator membrane, greater sciatic notch and margins of obturator foramen I- greater trochanter in front of piriformis rotates and extends thigh laterally L5 and S1 |
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Gemellus |
O-ischial spine, ischial tuberosity I-greater trochanter of femur rotates and extends thigh laterally L5 and S1 |
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Quadratus femoris |
O- ischial tuberosity I- trochanteric crest of femur rotates thigh laterally and stabilizes hip joint L5 and S1 |
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Biceps femoris |
lateral muscle of hamstrings O-ischial tuberosity I-Common tendon passes downward and laterally (forming lateral boarder of popliteal fossa) to insert into head of fibula and lateral condyle of tibia extends thigh and flexes knee; laterally rotates leg especially when knee is bent sciatic |
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semitendinosis |
O- ischial tuberosity I- medial aspect of upper tibial shaft extends thigh at hip; flexes knee; with semimembrinosis medially rotates leg sciatic |
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semimembranosus |
O- ischeal tuberosity I-medial condyle of tibia; via oblique political ligament to lateral condyle of femur extends thigh and flexes knee medially rotates leg sciatic |
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Tibealis Anterior |
O-lateral condyle and upper 2/3 of tibial shaft I-by tendon into inferior surface of medial cuneiform and first metatarsal Prime mover of dorsiflexion; inverts foot; assists in supporting medial long arch of foot deep fibular nerve |
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Extensor digitorum longus |
O-lateral condyle of tibia; proximal 3/4 of fibula; interosseous membrane I- middle and distal phalanges of toes 2-5 via extensor expansion prime mover of toe extension; dorsiflexes foot deep fibular nerve |
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Fibularis Tertius |
fused with distal part of extensor digitorum longs; not always present O-distal anterior surface of fibula and interosseous membrane I-tendon inserts on dorm of fifth metatarsal dorsiflexes and everts the foot deep fibular nerve |
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Extensor Hallucis longus |
deep to extensor digitorum longus and tibealis anterior ; narrow origin O-anteromedial fibula shaft and interosseous membrane I-tendon inserts on distal phalanx of great toe extends great toe and dorsiflexes the foot deep fibular nerve |
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Fibularis longus (peroneus) |
Superficial lateral muscle overlies fibula O-upper portion of lateral fibula I- by long tendon that curves underfoot to first metatarsal and medial cuneiform Plantar flexes and everts foot; may help keep foot flat on ground superficial fibular |
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Fibularis (peroneus) brevis |
O-distal fibula shaft I-by tendon running behind lateral mallows to insert on proximal end of fifth metatarsal Plantar flexes and everts the foot |
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Gastronemius |
two prominent bellies that form proximal curve of calf O-by two heads from the medial and lateral condyles of femur I-posterior calcaneus vial calcaneal tendon Plantar flexes the foot when knee is extended; can flex knee when for is dorsiflexed |
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Soleus |
broad flat muscle deep to gastronemius O-extensive origin from superior tibia, fibula, and interosseous membrane I-posterior calcaneus vial calcaneal tendon Plantar flexes foot; important locomotor and postural muscle during walking, running and dancing tibial nerve |
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Plantaris |
may be absent O-posterior femur above lateral condyle I-via a long, thin tendon into calcaneus or its tendon assists in knee flexion and plantar flexion of foot |
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Popliteus |
Thin triangular muscle at posterior of knee O-lateral condyle of femur and lateral meniscus I-proximal tibia flexes and rotates leg medially to unlock extended knee; with tibia fixed, rotates thigh laterally |
